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Code Issues Releases Activity

Crude Path MTU detection added

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lidgren
2010-12-12 19:07:55 +00:00
parent 55cdf75c5f
commit 772d80835b
12 changed files with 336 additions and 10 deletions
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20
Lidgren.Network/NetConnection.cs
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@@ -81,6 +81,7 @@ namespace Lidgren.Network
m_queuedAcks = new NetQueue<NetTuple<NetMessageType, int>>(4);
m_statistics = new NetConnectionStatistics(this);
m_averageRoundtripTime = -1.0f;
m_currentMTU = m_peerConfiguration.MaximumTransmissionUnit;
}
internal void SetStatus(NetConnectionStatus status, string reason)
@@ -139,6 +140,9 @@ namespace Lidgren.Network
SendPing();
}
// handle expand mtu
MTUExpansionHeartbeat(now);
if (m_disconnectRequested)
{
ExecuteDisconnect(m_disconnectMessage, true);
@@ -153,7 +157,7 @@ namespace Lidgren.Network
//
byte[] sendBuffer = m_peer.m_sendBuffer;
int mtu = m_peerConfiguration.m_maximumTransmissionUnit;
int mtu = m_currentMTU;
if ((frameCounter % 3) == 0) // coalesce a few frames
{
@@ -236,10 +240,10 @@ namespace Lidgren.Network
m_peer.VerifyNetworkThread();
int sz = om.GetEncodedSize();
if (sz > m_peerConfiguration.m_maximumTransmissionUnit)
if (sz > m_currentMTU)
m_peer.LogWarning("Message larger than MTU! Fragmentation must have failed!");
if (m_sendBufferWritePtr + sz > m_peerConfiguration.m_maximumTransmissionUnit)
if (m_sendBufferWritePtr + sz > m_currentMTU)
{
bool connReset; // TODO: handle connection reset
NetException.Assert(m_sendBufferWritePtr > 0 && m_sendBufferNumMessages > 0); // or else the message should have been fragmented earlier
@@ -279,7 +283,7 @@ namespace Lidgren.Network
if (chan == null)
chan = CreateSenderChannel(tp);
if (msg.GetEncodedSize() > m_peerConfiguration.m_maximumTransmissionUnit)
if (msg.GetEncodedSize() > m_currentMTU)
throw new NetException("Message too large! Fragmentation failure?");
return chan.Enqueue(msg);
@@ -351,6 +355,14 @@ namespace Lidgren.Network
int pongNr = m_peer.m_receiveBuffer[ptr++];
ReceivedPong(now, pongNr);
break;
case NetMessageType.ExpandMTURequest:
SendMTUSuccess(payloadLength);
break;
case NetMessageType.ExpandMTUSuccess:
NetIncomingMessage emsg = m_peer.SetupReadHelperMessage(ptr, payloadLength);
int size = emsg.ReadInt32();
HandleExpandMTUSuccess(now, size);
break;
default:
m_peer.LogWarning("Connection received unhandled library message: " + tp);
break;